Electric conductor



UNITED STATES PATENT OFFICE.

EDXVIN D. MOORAOKEN, OF PATERSON, NEIV JERSEY.

ELECTRIC CONDUCTOR.

SPECIFICATION forming part of Letters Patent No. 351,191, dated October19, 1886.

Application filed August 16, 188 1.

To all whom it may concern:

Be it known that I, EDWIN D. McOnAoKEN, of the city of Paterson, in thecounty of Passaic and State of New Jersey, have inventeda neu and usefulImprovement in Insulated Electric Conductors, of which the following isaspecification.

My invention relates to an electric wire or conductor which has aninsulating-covering, consisting of spirally wound and lapping strips ofpaper.

The invention consists in an electric couductorhaving aninsulating-covering, consisting of spirally-wound and lapping strips ofpaper and a vulcanized adhesive material.

The invention also consists in an electric conductor having a coating ofnon-vulcanizable material and a superposed insulating'covering,consisting of spirally-wound and lapping strips of paper and avulcanized adhesive substance, serving to secure the paper.

In the accompanying drawing I have represented a portion of a conductorembodying my invention.

A designates the wire or conductor, which may be of copper or othermetal; and B designates spirally-wound and lapping strips of paperapplied thereto with a vuleanizable adhesive substance. This substancemay consist of a solution of india-rubber to which enough sulphur hasbeen added to insure its vulcanization under a proper heat. A solutioncomposed of two ounces of indie-rubber dissolved in fourteen ounces ofbisulphide of carbon or other suitable solvent may be used, sufficientsulphur being added to insure vulcanization.

I may apply the spirallywound strips of paper with the vulcanizablecompound directly to the naked wire; but as the sulphur would be liableto attack the wire I prefer to apply to the naked wire a covering orcoating, a, of non-vulcanizable material, which will protect the wirefrom the sulphur. This nonvulcanizable material may consist of a mixtureof two parts of gutta-percha with one part of india-rubber, orthereabout, and in such case it may be applied by drawing the naked wirethrough a vessel containing the material, or in any other suitablemanner. Such a vessel or vat and the manner of using it are well knownto manufacturers of electric conductors.

Renewed August 19, 1886. Serial No. 211,261.

(No model.)

In lieu of nonvulcanizablc material of gutta percha and rubber, I mayapply a spirallywound and lapping strip of paper directly to the nakedwire, such paper serving as a covering of non-vulcanizable material.

I may apply one or more spirally-wound and lapping strips of paper, B,with vulcanizable adhesive substance, such as that above described, orany other suitable for the purose.

p In the drawing I have represented three strips, B, 'as applied outsidethe covering a of non -vuleanizable material. Each strip will be lappedfor about half its width, and the strips are applied so as to breakjoints with each other. The vulcanizable substance is represented inblack on the inner surfaces of the projecting end portions of the paperstrips B.

In applying the strips B the vulcanizable adhesive substanceis appliedto the inner side of the strip by a brush or in any other suitable way.I prefer, however, to apply the strips with vuleanizable adhesivesubstance by means of the machine shown and described in my applicationfor Letters Patent filed August 16, 1884, and of which the serial numberis 140,768. The amount of vulcanizable adhesive substance used will bevery little, and the amount of sulphur correspondingly small, and I mayin some cases dispense with the non-vu1canizable material a and applythspirally-wound strips of paper with vulcanizable adhesive substancedirectly upon the naked wire. After the covering of the wire iscompleted it is to be subjected to a heat sufficient to properlyvulcanize the adhesive substance employed to secure the strips of paper.The vulcanization may be edectcd by subjecting the wire in coils to theproper degree of heat in a chamber or vessel, which may be heated bymeans of a steam-jacket or by admitting steam directly into it. Afterthe wire has been subjected to a vulcanizingheat it may be covered orcoated with asphaltum or other analogous substance to reu der itelement-proof.

WVhat I claim as my invention, and desire to secure by Letters Patent,is-

1. An electric conductor having an insulatin g-coverin g consisting ofone or more spirally- (No Model.) I

E. D. MOORAOKEN.

ELEGTRIU CONDUCTOR.

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